title: Direct photothermal techniques for rapid quantification of total anthocyanin content in sour cherry cultivars.
abstract: The analytical performance of the newly proposed laser-based photoacoustic spectroscopy (PAS) and of optothermal window (OW) method for quantification of total anthocyanin concentration (TAC) in five sour cherry varieties is compared to that of the spectrophotometry (SP). High performance liquid chromatography (HPLC) was used to identify and quantify specific anthocyanins. Both, PAS and OW are direct methods that unlike SP and HPLC obviate the need for the extraction of analyte. The outcome of the study leads to the conclusion that PAS and OW are both suitable for quick screening of TAC in sour cherries. The correlation between the two methods and SP is linear with R(2)=0.9887 for PAS and R(2)=0.9918 for OW, respectively. Both methods are capable of the rapid determination of TAC in sour cherries without a need for a laborious sample pretreatment.
authors.affiliation: Department of Physics and Mathematics, University of West Hungary, Deak F. sq. 1, 9200 Mosonmagyaróvár, Hungary. dokao@mtk.nyme.hu
authors.forename: Ottó
authors.initials: O
authors.lastname: Dóka
authors.forename: Gitta
authors.initials: G
authors.lastname: Ficzek
authors.forename: Dane
authors.initials: D
authors.lastname: Bicanic
authors.forename: Ruud
authors.initials: R
authors.lastname: Spruijt
authors.forename: Svjetlana
authors.initials: S
authors.lastname: Luterotti
authors.forename: Magdolna
authors.initials: M
authors.lastname: Tóth
authors.forename: Josephus Gerardus
authors.initials: JG
authors.lastname: Buijnsters
authors.forename: György
authors.initials: G
authors.lastname: Végvári
mesh_terms: D000162:Acoustics; D000872:Anthocyanins / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D010777:Photochemistry / Q000379:methods*; D027861:Prunus / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods; D013696:Temperature
chemical_list: D000872:Anthocyanins